diff --git a/src/Neo/Neo.csproj b/src/Neo/Neo.csproj
index 234fbc62c6..130ff2a570 100644
--- a/src/Neo/Neo.csproj
+++ b/src/Neo/Neo.csproj
@@ -22,4 +22,8 @@
     <ProjectReference Include="..\Neo.VM\Neo.VM.csproj" />
   </ItemGroup>
 
+  <ItemGroup>
+    <InternalsVisibleTo Include="Neo.SmartContract.Testing" />
+  </ItemGroup>
+
 </Project>